The Forge

Calculators, inspectors and builders for developers and AI engineers.

Model & Inference

VRAM CalculatorFit a model to your GPU before you download it.Quantization PlannerCompare Q4, Q5, Q8 and FP16 trade-offs.Serving Command BuildervLLM, llama.cpp and Ollama flags, generated.

File Inspectors

GGUF InspectorRead metadata and tensor shapes from a GGUF.Safetensors InspectorList tensors, dtypes and shapes in a checkpoint.

Tokens & Prompts

Tokenizer PlaygroundSee exactly how text splits into tokens.Token Cost EstimatorPrice a prompt across model providers.Prompt DiffSpot what actually changed between two prompts.

Data & Datasets

JSONL ValidatorCheck a fine-tuning dataset line by line.PII ScrubberFind and mask personal data in a dataset.

Agents & Traces

Function-Calling ValidatorValidate tool-call JSON against your schema.Agent Trace ViewerTurn a raw trace into a readable timeline.

Dev Utilities

Regex TesterTest a pattern against real sample text.YAML ⇄ JSON ConverterConvert config both ways, safely.Cron BuilderReadable schedules from plain language.

Most tools here run entirely in your browser. Anything that needs a server is deleted straight after.